New improved geocoder with extra added AJAX and OSM Namefinder support.
This commit is contained in:
Tom Hughes
parent
e8809a10f5
commit
397db07d65
8 changed files with 342 additions and 251 deletions
|
|
@ -1,134 +1,150 @@
|
|||
class GeocoderController < ApplicationController
|
||||
layout 'site'
|
||||
|
||||
require 'uri'
|
||||
require 'net/http'
|
||||
require 'rexml/document'
|
||||
|
||||
def search
|
||||
if params[:postcode] and not params[:postcode].empty?
|
||||
check_postcode(params[:postcode])
|
||||
elsif params[:query][:postcode] and not params[:query][:postcode].empty?
|
||||
check_postcode(params[:query][:postcode])
|
||||
elsif params[:query][:place_name]
|
||||
redirect_to :controller => 'geocoder', :action => 'results', :params => {:place_name => params[:query][:place_name]}
|
||||
end
|
||||
end
|
||||
@query = params[:query]
|
||||
@results = Array.new
|
||||
|
||||
def check_postcode(p)
|
||||
|
||||
@postcode_arr = []
|
||||
postcode = p.upcase
|
||||
escaped_postcode = postcode.sub(/\s/,'%20')
|
||||
|
||||
begin
|
||||
if postcode.match(/(^\d{5}$)|(^\d{5}-\d{4}$)/)
|
||||
# Its a zip code - ask geocoder.us
|
||||
# (They have a non commerical use api)
|
||||
Net::HTTP.start('rpc.geocoder.us') do |http|
|
||||
resp = http.get("/service/csv?zip=#{postcode}")
|
||||
if resp.body.match(/couldn't find this zip/)
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :error => "invalid_zip_code"
|
||||
return
|
||||
end
|
||||
data = resp.body.split(/, /) # lat,long,town,state,zip
|
||||
lat = data[0]
|
||||
lon = data[1]
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :mlat => lat, :mlon => lon, :zoom => 14
|
||||
return
|
||||
end
|
||||
elsif postcode.match(/^([A-Z]{1,2}\d+[A-Z]?\s*\d[A-Z]{2})/)
|
||||
# It matched our naive UK postcode regexp
|
||||
# Ask npemap to do a combined npemap + freethepostcode search
|
||||
Net::HTTP.start('www.npemap.org.uk') do |http|
|
||||
resp = http.get("/cgi/geocoder.fcgi?format=text&postcode=#{escaped_postcode}")
|
||||
dataline = resp.body.split(/\n/)[1]
|
||||
data = dataline.split(/,/) # easting,northing,postcode,lat,long
|
||||
lat = data[3]
|
||||
lon = data[4]
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :mlat => lat, :mlon => lon, :zoom => 14
|
||||
return
|
||||
end
|
||||
elsif postcode.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d/)
|
||||
# It's a canadian postcode
|
||||
# Ask geocoder.ca (note - they have a per-day limit)
|
||||
postcode = postcode.sub(/\s/,'')
|
||||
Net::HTTP.start('geocoder.ca') do |http|
|
||||
resp = http.get("?geoit=XML&postal=#{postcode}")
|
||||
data_lat = resp.body.slice(/latt>.*?</)
|
||||
data_lon = resp.body.slice(/longt>.*?</)
|
||||
lat = data_lat.split(/[<>]/)[1]
|
||||
lon = data_lon.split(/[<>]/)[1]
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :mlat => lat, :mlon => lon, :zoom => 14
|
||||
return
|
||||
end
|
||||
elsif postcode.match(/(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW]) [0-9][ABD-HJLNP-UW-Z]{2})
|
||||
/)
|
||||
#its a UK postcode
|
||||
begin
|
||||
Net::HTTP.start('www.freethepostcode.org') do |http|
|
||||
resp = http.get("/geocode?postcode=#{postcode}")
|
||||
lat = resp.body.scan(/[4-6][0-9]\.?[0-9]+/)
|
||||
lon = resp.body.scan(/[-+][0-9]\.?[0-9]+/)
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :mlat => lat, :mlon => lon, :zoom => 14
|
||||
return
|
||||
end
|
||||
rescue
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :error => "invalid_postcode"
|
||||
#redirect to somewhere else
|
||||
end
|
||||
elsif
|
||||
# Some other postcode / zip code
|
||||
# Throw it at geonames, and see if they have any luck with it
|
||||
Net::HTTP.start('ws.geonames.org') do |http|
|
||||
resp = http.get("/postalCodeSearch?postalcode=#{escaped_postcode}&maxRows=1")
|
||||
hits = resp.body.slice(/totalResultsCount>.*?</).split(/[<>]/)[1]
|
||||
if hits == "0"
|
||||
# Geonames doesn't know, it's probably wrong
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :error => "invalid_postcode_or_zip"
|
||||
return
|
||||
end
|
||||
data_lat = resp.body.slice(/lat>.*?</)
|
||||
data_lon = resp.body.slice(/lng>.*?</)
|
||||
lat = data_lat.split(/[<>]/)[1]
|
||||
lon = data_lon.split(/[<>]/)[1]
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :mlat => lat, :mlon => lon, :zoom => 14
|
||||
end
|
||||
else
|
||||
# Some other postcode / zip file
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :error => "invalid_postcode_or_zip"
|
||||
return
|
||||
end
|
||||
rescue
|
||||
#Its likely that an api is down
|
||||
redirect_to :controller => params[:next_controller], :action => params[:next_action], :error => "api_down"
|
||||
if @query.match(/^\d{5}(-\d{4})?$/)
|
||||
@results.push search_us_postcode(@query)
|
||||
elsif @query.match(/(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW]) [0-9][ABD-HJLNP-UW-Z]{2})/i)
|
||||
@results.push search_uk_postcode(@query)
|
||||
elsif @query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
|
||||
@results.push search_ca_postcode(@query)
|
||||
else
|
||||
@results.push search_osm_namefinder(@query)
|
||||
@results.push search_geonames(@query)
|
||||
end
|
||||
end
|
||||
|
||||
def results
|
||||
@place_name = params[:place_name]
|
||||
res_hash = {}
|
||||
@res_ary = []
|
||||
begin
|
||||
Net::HTTP.start('ws.geonames.org') do |http|
|
||||
res = http.get("/search?q=#{URI.escape(@place_name)}&maxRows=10")
|
||||
xml = REXML::Document.new(res.body)
|
||||
xml.elements.each("geonames/geoname") do |ele|
|
||||
res_hash = {}
|
||||
ele.elements.each("name"){ |n| res_hash['name'] = n.text }
|
||||
ele.elements.each("countryCode"){ |n| res_hash['countrycode'] = n.text }
|
||||
ele.elements.each("countryName"){ |n| res_hash['countryname'] = n.text }
|
||||
ele.elements.each("lat"){ |n| res_hash['lat'] = n.text }
|
||||
ele.elements.each("lng"){ |n| res_hash['lon']= n.text }
|
||||
@res_ary << res_hash
|
||||
end
|
||||
end
|
||||
private
|
||||
|
||||
flash.delete(:notice)
|
||||
rescue Timeout::Error
|
||||
flash[:notice] = "Timed out waiting for results from ws.geonames.org"
|
||||
rescue Exception => ex
|
||||
flash[:notice] = "Error contacting ws.geonames.org: #{ex.to_s}"
|
||||
def search_us_postcode(query)
|
||||
results = Array.new
|
||||
|
||||
# ask geocoder.us (they have a non-commercial use api)
|
||||
response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{URI.escape(query)}")
|
||||
|
||||
# parse the response
|
||||
unless response.match(/couldn't find this zip/)
|
||||
data = response.split(/\s*,\s+/) # lat,long,town,state,zip
|
||||
results.push({:lat => data[0], :lon => data[1], :zoom => 12,
|
||||
:description => "#{data[2]}, #{data[3]}, #{data[4]}"})
|
||||
end
|
||||
|
||||
return { :source => "Geocoder.us", :url => "http://geocoder.us/", :results => results }
|
||||
rescue Exception => ex
|
||||
return { :source => "Geocoder.us", :url => "http://geocoder.us/", :error => "Error contacting rpc.geocoder.us: #{ex.to_s}" }
|
||||
end
|
||||
|
||||
def search_uk_postcode(query)
|
||||
results = Array.new
|
||||
|
||||
# ask npemap.org.uk to do a combined npemap + freethepostcode search
|
||||
response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{URI.escape(query)}")
|
||||
|
||||
# parse the response
|
||||
unless response.match(/Error/)
|
||||
dataline = response.split(/\n/)[1]
|
||||
data = dataline.split(/,/) # easting,northing,postcode,lat,long
|
||||
results.push({:lat => data[3], :lon => data[4], :zoom => 12,
|
||||
:description => data[2].gsub(/'/, "")})
|
||||
end
|
||||
|
||||
return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :results => results }
|
||||
rescue Exception => ex
|
||||
return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :error => "Error contacting www.npemap.org.uk: #{ex.to_s}" }
|
||||
end
|
||||
|
||||
def search_ca_postcode(query)
|
||||
results = Array.new
|
||||
|
||||
# ask geocoder.ca (note - they have a per-day limit)
|
||||
response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{URI.escape(query)}")
|
||||
|
||||
# parse the response
|
||||
unless response.get_elements("geodata/error")
|
||||
results.push({:lat => response.get_text("geodata/latt").to_s,
|
||||
:lon => response.get_text("geodata/longt").to_s,
|
||||
:zoom => 12,
|
||||
:description => query.upcase})
|
||||
end
|
||||
|
||||
return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :results => results }
|
||||
rescue Exception => ex
|
||||
return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :error => "Error contacting geocoder.ca: #{ex.to_s}" }
|
||||
end
|
||||
|
||||
def search_osm_namefinder(query)
|
||||
results = Array.new
|
||||
|
||||
# ask OSM namefinder
|
||||
response = fetch_xml("http://www.frankieandshadow.com/osm/search.xml?find=#{URI.escape(query)}")
|
||||
|
||||
# parse the response
|
||||
response.elements.each("searchresults/named") do |named|
|
||||
lat = named.attributes["lat"].to_s
|
||||
lon = named.attributes["lon"].to_s
|
||||
zoom = named.attributes["zoom"].to_s
|
||||
place = named.elements["place/named"] || named.elements["nearestplaces/named"]
|
||||
type = named.attributes["info"].to_s.capitalize
|
||||
name = named.attributes["name"].to_s
|
||||
distance = format_distance(place.attributes["approxdistance"].to_i)
|
||||
direction = format_direction(place.attributes["direction"].to_i)
|
||||
placename = place.attributes["name"].to_s
|
||||
results.push({:lat => lat, :lon => lon, :zoom => zoom,
|
||||
:description => "#{type} #{name}, #{distance} #{direction} of #{placename}"})
|
||||
end
|
||||
|
||||
return { :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :results => results }
|
||||
rescue Exception => ex
|
||||
return { :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :error => "Error contacting www.frankieandshadow.com: #{ex.to_s}" }
|
||||
end
|
||||
|
||||
def search_geonames(query)
|
||||
results = Array.new
|
||||
|
||||
# ask geonames.org
|
||||
response = fetch_xml("http://ws.geonames.org/search?q=#{URI.escape(query)}&maxRows=20")
|
||||
|
||||
# parse the response
|
||||
response.elements.each("geonames/geoname") do |geoname|
|
||||
lat = geoname.get_text("lat").to_s
|
||||
lon = geoname.get_text("lng").to_s
|
||||
name = geoname.get_text("name").to_s
|
||||
country = geoname.get_text("countryName").to_s
|
||||
results.push({:lat => lat, :lon => lon, :zoom => 12,
|
||||
:description => "#{name}, #{country}"})
|
||||
end
|
||||
|
||||
return { :source => "GeoNames", :url => "http://www.geonames.org/", :results => results }
|
||||
rescue Exception => ex
|
||||
return { :source => "GeoNames", :url => "http://www.geonames.org/", :error => "Error contacting ws.geonames.org: #{ex.to_s}" }
|
||||
end
|
||||
|
||||
def fetch_text(url)
|
||||
return Net::HTTP.get(URI.parse(url))
|
||||
end
|
||||
|
||||
def fetch_xml(url)
|
||||
return REXML::Document.new(fetch_text(url))
|
||||
end
|
||||
|
||||
def format_distance(distance)
|
||||
return "less than 1km" if distance == 0
|
||||
return "about #{distance}km"
|
||||
end
|
||||
|
||||
def format_direction(bearing)
|
||||
return "south-west" if bearing >= 22.5 and bearing < 67.5
|
||||
return "south" if bearing >= 67.5 and bearing < 112.5
|
||||
return "south-east" if bearing >= 112.5 and bearing < 157.5
|
||||
return "east" if bearing >= 157.5 and bearing < 202.5
|
||||
return "north-east" if bearing >= 202.5 and bearing < 247.5
|
||||
return "north" if bearing >= 247.5 and bearing < 292.5
|
||||
return "north-west" if bearing >= 292.5 and bearing < 337.5
|
||||
return "west"
|
||||
end
|
||||
end
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue